I have found that using currency data types results in incorrect answers for simple math operations. For example, if I have a currency value and multiply it by a decimal value it appears that foxpro converts the decimal value to a currency type before the operation rather than after the operation. Test the following on your machine:
1050.45 * .41116=431.9030
$1050.45 * .41116=431.9450

This has got to be an error and it renders currency virtually useless without doing mton conversions everywhere.

Microsoft are you going to fix this???